Honeywell HC900 Installation And User Manual page 147

Table 30 - Scanner Diagnostics
Diagnostic Number
Condition
of
Strobes
Watchdog Reset 3
Prefetch abort 3
CPU exception
Address error 3
CPU exception
Undefine 3
instruction CPU
exception
Data abort CPU 3
exception
Software interrupt 3
exception
Vector error 3
Flash write error 4
Rack backplane 6
failure
Revision 5
9/03
Possible Cause
Watchdog reset resulting from
software failure
CPU failed when attempting to
fetch an instruction from the
prefetch register.
The reserved exception
occurred for an unknown
reason.
Bad Instruction Detected
CPU failed when attempting to
access data.
Spurious Interrupt
Interrupt vectors in RAM were
corrupted
Flash failed to burn properly.
The Scanner is unable to
successfully communicate to
any modules that are in its SPI
backplane.
HC900 Hybrid Controller Installation and User Guide
Diagnostics and Troubleshooting - User Interface
Scanner Action User Action
Scanner restarts and 1. Cycle power to the scanner
requests configuration
2. Upgrade scanner software
from the main CPU.
3. Replace scanner module
4. Contact Honeywell Personnel.
See watchdog reset 1. Cycle power to the scanner
2. Isolate system from noise and
cycle power to the scanner
3. Replace scanner module
See watchdog reset See Prefetch abort CPU
exception
See watchdog reset See Prefetch abort CPU
exception
See watchdog reset See Prefetch abort CPU
exception
See watchdog reset See Prefetch abort CPU
exception
Interrupt vectors were See Watchdog reset
restored
The boot code is the Do a code download.
only software running.
This software waits
for a request to burn
the flash. It does no
scanning of modules.
Modules remain in
their failsafe state.
Does no scanning of 1. Remove modules and check
modules. Modules for bent pins on connectors.
remain in their failsafe
2. Reinsert modules one at a time
state.
and note which module the
diagnostic reoccurs, and
replace that module.
3. Cycle power to the rack.
4. Replace the power supply.
5. Replace the rack.
6. Replace the scanner module.
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